Rebound check for vehicles



April 29, 14930. A c. s. BURTON 1,756,052

REBOUND CHECK FOR VEHICLES Fi1ed'Jan-24, 1923 l s sheets-sheet 2 April 29, 1930. c. s. BURTON 1,756,052

REBOUND CHECK FOR VEHICLES Filed Jan. 24, 1923 3 Sheets-Sheet 3 Patented Apr. 29, 1930 UNITED STATES PATENT OFFE@ f 'CHARLES S. BURTON, OF OAK PARK, ILLINOIS, ASSIGNOR T0 STEWART-WARNER CORPORATION, 0F CHICAGO, ILLINGIS, A CORPORATION OF VIRGINIA REBOUND CHECKV EOE VEHICLES Application filed January 24, 1923. Serial No. 614,668.

The purpose of this invention is to provide ank improved construction of reboundl checks for vehicles adapted to afford spring and friction resistance to the rebound of the vehicle after the depression lincident to the dropping of the wheels into a depression in the road and adapted also to afford frictional resistance to the descending movement of the vehicle under such circumstances and adapted also to be constructed more economically than previous devices of this character. It consists inthe elementsand features of construction shown and described as indicated in the claims. v

VIn general the device consists of a drum or pulley formed of two members, one cupshaped and thevother a Y'cap for the cup 'journaled on a fixed' stud or center post, which constitutes the means of mounting the device upon the vehicle body orv axle; a helically coiled spring within the drum having the inner end connectedV to the journaled stud and the outer end connected to the drum; a casing which encloses the drum on the journal stud comprising two members, one a cup shaped stamping and the other a cap or closure for the open end of the cup; self-lubrieating friction disks interposed at opposite sides of the drum between the same and the opposite walls of the casing; a flexible strap secured to and wrapped about the drum and emerging through a peripheral opening in the casing; the casing as well as the drum being adapted to be entered onto the stud from the free end,-that is, the end opposite that by which it is attached to the vehicle axle or body; the attaching bracket or mounting piece constituting a stop against which Y all the parts entered on the stud are stopped longitudinally of the stud; a spring being provided on the outer ends of the stud .for pressing against the outer side of the casing to yieldingly compact all the elements in the casing together and against the stop shoulder ofthe mounting piece or bracket, and a nuton the outer end ofthe stud for tensioning this laterally stressing spring to regulate the friction for resisting the rotation of the drum.

Referring to the drawings -v Figure l is an axial section of the entire device cutting through the opening through which the strap emerges.

Figure 2 isv a section at the line, 2 2, on

Figure l, being trans-axial of the entire device.

Figure 3 is a detail right `hand side elevation of the central portion of the device broken out from the remainder, showing the mounting piece or bracket in its engagement with the cup member of the casing.

Figure 4 is a detail plan view of a link for connecting the outer end of the helical spring with the drum.

Figure 5 is an elevation of the cup member of the casing looking into it from the open end or side. p

Figure 6 is an elevation through an inner and outer side of the cover member ofthe casing.

Figure 7 is an elevation of the cup member of the drum looking into it from the open side.

Figure 8 is an elevation of the cover member of the drum.

In these figures B is the journal stud reduced in diameter at the inner end and threaded at B1, for screwing into the mounting'piece or bracket, A which may be of any convenient form suitable for attaching to the vehicle body or axle according to the circumstances and form of the part to which the attachment is to be made. The threaded boss form of this device, shown, is not obligatory, but the radially projecting fingers or lugs A1, or the equivalent of them for engaging the casing as shown, and hereinafter described, constitute an important feature of this bracket or mounting piece. rlhe journal stud, B, is screwed tight into the mounting piece, A, bringing the shoulder, B, tight against the latter. The cup member, D, of the casing having a central aperture for admitting the journal stud, B, is next passed onto theystud back against the bracket or mounting piece, A; and this cup member being a stamping is provided with outwardly struckV bosses, D3, between which the iingers, A1, ofthe bracket become engaged when the casing is introduced onto this journal stud, as described. j Y Y The next in Order ofassemblage, the helical-spring, Gr, is placed within the cup meinber, D, ofthe drum, its outer end being connected with the drumby the link, H, and

the spacer sleeve, K, whichis Va split ring, is engaged with the inner hook end, G2, of the spring; the cover me1nber,c, of the drum is then applied, itsradial projections, 01, en-

gaging the notches', 01, in the edge of thel flange, C1, of the cup member, C, of the drum;

one of the selflubricating disks, E, is ap-` plied on the outer face of the cover member,

helical'y s'pringbeing slightly sprung open to admit it in view 'of the hookend, G2,

-which,'however`,'readily snaps into the slot,

B4,'provided for it inthe journal stud, or

Y the slot B4,'being extended to the end of the stud for convenience of'in'troducing the hook of the spring. A second self-lubricating disk, E, is next applied against the .outer side of the drum andthe cover member, d,

- of the casing is introduced onto lthe journal,

its radial projection, (Z1, engaging the notches, D10,`of the cup member of the casing; the spring, L, which is'shown inthe star'form but which might be of any desirable form, is introducedv onto the outer end of the stud and followed by the tensioningnut, M. If desired, an additional coil spring, N', may be lprovided and introduced under therstarshaped spring, L, or a suitably'heavy coil springsuch as N, maybe employed alone for tensioning the lateral friction ofthe parts.

" 4fils shown, the Adrum' members are both re- "cessed on' the outer sides to receive and position the self-lubricating parts, E; but this isnot necessary 'since these parts, E, are defn initely positionedbybeing centered on the annular bosses, C2, and c2, of the cup member and c-over member respectively, of the drum. f In operation it will be seen that frictional resistance to the rotation ofthe drum in the lcasing may occur at both sides of the self-v lubricating parts, ELE, thatis, on the outer surfacesv of the drum and on the inner sur-VV faces of the casing.

The drum Yas well as the casing can be a stamping.

It will be understood that this spacer sleeve, VK, is desirable, if not necessary,` for the purpose of `insuring against crushing or springing together the oppositeV sides of the drumy by the pressure applied for lateral friction, and to insure that said lpressure is transmitted to the inner self-lubricating `disk ortplate, E. It will be understoodth'at the thickness of the plates, E, should be slightly more than the height 'of the bosses, c? and C2, so that the pressure applied'for friction shall operate to press together the vcasing Walls and the side walls of thel drum withouty stoppage ofthe'said casingrwall against the'said annular bosses, c2` and C2.

The operation ofthe device may be un# derstood from the foregoing description of the'constructionto be, that the entire device having'been mounted by means of the'mount-y ing member, A, upon thevehiclebody, the strap,'F,1s Withdrawn, rotating the drum for tensioning the'spring, G, to any desired degree, and then secured to any convenient part of theehassis. vV'Jhen by jolting ofthe vehicle inztravel over the road, the body of the vehicle Yis lowered, tensioningy the vehicle springs, the reaction'of the coil spring,

Gr,- causes rotation-ofthe,drum which takes up the slack of the cable dueto the lowering of theV vehicle body; ,and uponthe upward recoil of the body caused by the reaction of,

the vehicle springs orgoppositejolt'ing, the spring, G,.due toits tension, tends toV resist the unwinding of the strap by the upward movement vof the 'vehiclefbodjg and in the necessaryunwinding ofthe strap, the spring is retensioned while theV recoil ischecked by itsr'esistance, said recoil 'and uni-vindingbeing further checked' by the resistanceto the rotation-of the drum due `to, the lateral friction between4 the drum Yand fthe enclosing wall of. thecase .or the interposed frictionV platesor both. Y

l claimz-V f f l v l. 'ln a device for the purpose'indicated,

Va. rotatable drum, a xed journal bearing member for the drum, a spring connecting the drum with the journal'bearing member' rfor being tensioned by the rotation of the drum inone direction and for rotating the drumv in the opposite. direction by its reaction', a fixed casingenclosing the drum and spring, a flexible Aconnector Wrapped around the drum and secured thereto at one end, the other 'end emerging from the casing at the periphery of the latter, a. friction plate loose on the journal vbearing lodged in the casing between one side wall thereof and the adjacent side of the drum, the casing comprising side. plate which is movable along the axis relatively'to the casing? body and vnon-rotatably engaged with said body, and Yspring means for stressing the friction plate against the drumlocated exteriorly of the `casing and reacting between the journal bearing Vand said movable Vside of thecasing for pressing the latter againstjthe idrum. i Y

2; ln the `construction defined in claim l,

the opposite side of thev drum.

3. lny adevice .for the purposeindicated ,drum comprising a cup member and a cap plate for closing the otherwise open side thereof, a spacing sleeve on the journal bearing between the bottom and the cap plate of the drum, the journal bearing member having a slot for engaging the inner coil of the spring, and the sleeve being par-axially slotted for registration with the journal bearing slot to admit the hoolr connection of the spring into said'slot.

4i.. In the construction deiined in claim l, foregoing, the journal bearing member being extended to protrude from the casing at one side, and amounting member with which said protruding end is adapted to be rigidly engaged, the casing wall at that side having .exterior protuberances and the mounting member having lugs for engagement with said protuberances when the casing is held against the mounting member, the casing and the drum being adapted to slide along the journal bearing member, and the spring for pressing the friction plate against the drum being outside the casing at the opposite side from that which has 'said protuberances for engaging the mounting member, and a stop on the opposite end of the journal bearing member between Vwhich'and the approximate wall of the cast ing said last mentioned spring is tensioned.

5. In the construction defined in claim l, foregoing, the drum comprising a cup member and a cap member for closing the open side of the cup; a hoolr for attaching the outer end of the coiled spring to the drum consisting of a clip having at one end an aperture for hooking the spring to the link and at the other end opposite laterally protruding pintles, the bottom disk of the cup and the cap plate having pivot apertures for engaging said pivots, the cup and the cap periphery having interlocking projections and recesses relatively positioned for engaging the cap with the cup to position said pintle apertures directly opposite each other.

6. In the construction defined in claim l, foregoing, a hook for engaging the flexible connector strap with the drum consisting of a metal clip folded to embrace the end of the strap and having hooks at its opposite sides at the folded end, the drum having eyes for engagement of said hooks positioned at op,- posite points adjacent to the side Walls of the drum in the zones between said side Walls and the interiorly coiled spring.

7. In a rebound controller, a rotatable drum; a strap to be wound onto and unwound from the drum; a casing within which the drum is mounted for rotation and between .whose side walls it is enclosed; a spring within the drum for Winding the strap onto the drum and yieldingly resisting the unwinding, and a pair of friction members engaging respectively the opposite sides of ythe drum and the correspondingly opposite sides ofy the casing, whereby friction due to the rotation of ythe drum relatively to the casing is obtained at and distributed over four planes of Contact of the friction members.

e 8. In a rebound controller, a drum; a strap adapted to be wound onto and unwound from the drum; a spring for rotating the drum in one direct-ion so as to wind the strap thereon; self-lubricating members associated with the drum on oppositesides of the spring, and a casing composed of relatively movable parts rhaving respectively opposite sides enclosing the spring and drum between them, and means for yieldingly pressing said casing parts toward each other for pressing said opposite sides respectively toward the corresponding opposite sides of the drum.

9. ln a rebound controller, adrum, a strap adaptedto be wound onto the drum and to be unwound therefrom, and a spring for rotating the drum in one direction, and a casing in which the drum is enclosed between opposite side walls thereof, and self-lubricating disks mounted co-aXia-lly with the drum be tween the opposite sides of the drum and the correspondingly opposite side walls of the casing for frictional co-operation both with the drum sides and with the casing walls.

10. In a lrebound controller, a rotatable drum, a strap adapted to be wound onto the drum and to be unwound therefrom, and a spring for rotating the drum in one direction, said drum being composed of a pair of side members and an intervening peripheral member adapted to receive the strap.

l1. n a rebound controller, a rotatable drum; a strap adapted to be wound onto the drum and to be unwound therefrom; said drum being composed of opposite side walls and a peripheral wail, a spring mounted within the drum for rotating the drum in one direction, one of the side walls of the drum formed for engagement with4 the peripheral wall and adapted to be applied to and engaged with the latter after the spring is mounted in the drum.

12. ln a rebound controller, a rotatable drum, a strap adapted to be wound onto the drum and to be unwound therefrom, and a spring for rotating the drum in one direction, said drum being composed of a pair of side members and an intervening peripheral member to which the inner end of the strap and the outer end of the spring are attached.

13. In a rebound controller, rotatable parts comprising a drum, a strap adapted to be wound onto the drum and unwound therefrom; a spring for rotating the drum in one direction mounted within the drum, said rotatabl'e parts comprising a pair of self-lubricating members at opposite sides of the drum, the drumoomprising aside which is removable from the remainder,V said remainder 5 having means for-attaching the inner end of the strap and the outer end of the spring, thev removable sidebeing adapted to be apf plied together with one of the self-lubricating'parts after the spring is inserted and attached. I, i i *Y y lll.k In av rebound controller, a drum, a strap adapted to be Wound onto the Vdrum and to be unWound therefrom, and a spring for rotating-tlle drum infone direction, a'y pair of self lubricating side members mounted at opposite sides of the drum; means holding saidl members1-1inl riCtio'nal engagement with the drum sides and a peripheral member vto which y ,A I the'in'ner endl of the strap and the vouter end Y '.20 of the spring are connected, the spring being `i 1" housed Within the drum. 1 1 ,l YIn testimony whereof, I have hereunto setfgmy hand at Chicago, Illinois, this th 1 Vday of January, 1923. Y '1 1 CHARLES S. BURTON. 

